cosecant Trig.
(kəʊˈsiːkənt)
[f. co- prefix 4 + secant. The L. cosecans was used a 1576 by Rheticus, Opus Palatinum (1596). F. cosécante.]
The secant of the complement of a given angle. (Abbreviated cosec.)
| 1706 in Phillips, Co-secant. 1807 Hutton Course Math. II. 3 The radius, cotangent, and cosecant [form] another right-angled triangle cdl. 1868 Lockyer Elem. Astron. 243 AP / PM ..is called the cosecant of A (written cosec. A). |